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Probability 9Math
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Key Concepts:
Terms in this set (20)
Number of trials
total number of times the experiment is repeated
Outcomes
The possible results of a trial
Event
One specific outcome
Frequency
Number of times the outcome is observed
Relative frequency
Frequency of an outcome expressed as a fraction or percentage of the total number of trials
Sample space
Set of all possible outcomes
Tree diagram
Grid
Venn Diagram
Complement of an event
the event does not occur
Compound (combined) events
More than one event
Independent events
the occurrence of each event does not affect the occurrence of the other
P(AnB) = P(A) x P(B)
Dependent events
the occurrence of each event affects the occurrence of the other event
Sampling with replacement
a selected object is replaced before a second object is selected
Sampling without replacement
a selected object is not replaced before a second object is selected
Expectation
How many times we predict a particular event will occur
Impossible
not possible
Certain
having no doubt; sure
Theoretical Probability
What should occur or what we expect to happen in an experiment
Experimental Probability
Probability that is based on repeated trials of an experiment
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